目前數位通信系統技術與服務已經在全世界被廣泛的使用，如今面對使用者對數據傳輸的速度需求日增的情況下,而產生效能更佳IEEE 802.16-2004系統;它是使用正交分頻多工(Orthogonal Frequency Division Multiple, OFDM)的工作模式。而正交分頻多工系統是一種有效率的方式，能夠同時達到高傳輸率並且對抗碼際干擾，其具有多個載波，當通道面對各式各樣的環境時,而頻率選擇性衰落及多路徑的影響,使其傳輸距離也各也差異,本論文是對IEEE 802.16-2004 的系統上，因電波傳播的特性將影響發射機及接收機之間的通訊品質，所以我們在本篇論文中,主要探討發射端與接收端在各種環境的電波傳播數據上去估測和分析涵蓋範圍。然而我們如何去估測在這特定的環境中,傳播涵蓋距離和特定的發射功率,可供多少使用者使用,也將詳細說明。 Digital communication technology and service have been widely used and applied around the globe. An increasing demand of greater transmission rates by users has resulted in IEEE 802.16-2004 systems with better efficiency. The systems employ OFDM (Orthogonal Frequency Division Multiplexing), which is a promising technology and is able to combat ISI. In this research we focus on the IEEE 802.16-2004 systems. The characteristics of propagation affect highly the quality of communication between the transmitter and the receiver. Therefore, in this research, we focus on estimating the coverage in the transmission data of electric waves between the transmitter and the receiver in various environments. At the same time, we go into details how to estimate coverage, transmission power, and the number of users in various operational environments.
